What's the longest you've left your console or PC on?

So I'm at a friend's house and we are playing Metal Gear Solid 3: Subsistence on his old PS2, he barely touches this thing and we have no memory card so we are just leaving it on until we beat the game.  So far it's been on for 13 hours and we are at the end of The Pain.
But I am wondering, how long can I probably keep this PS2 on and how long have you kept a console on?  What's your record?

Here's mine:
SNES: 10 hours
Gamecube: 32 hours
PS2: I think 2 days, can't remember
N DS: 3 days
Xbox 360 (borrowed it from a friend): 18 hours
PS3: 40 hours
PC: 1 week

Let's see some numbers!

My PC has been on for been on consistently for the last 6 months, at least. Enable hibernate and have the hdd's go to sleep if they are not in use for 30 minutes, you are good to go. That is probably why my electricity bills are raping me lately :(

My latest 360 has never been on more then 2 hours in a row. A million 3rods makes you pretty fucking paranoid.

Other than my PC, which is on constantly. I left my N64 on for 5 days since I didn't have a controller pak for Quest 64.

Oh, and I left a friend's DS on for a week because I wanted to shatter his record on a SM64DS minigame.

Xbox 360 left on for 3 days.

I've left my PC on for a few days, but that is about it. When it comes to my consoles, they are when I'm playing, and off when I'm not. Depending on the circumstances, it might be on while I'm away doing something, but would be back shortly to resume play.

I try not to keep my Xbox 360 on for more than a few hours but I am sure I have gotten up to about 7 hours with it on. My PC has been on for many, many days (probably about a week or more) and my Gamecube has been on for about a week as well. I am sure my PS2 has a similar statistic and the Wii and PS3 are probably only a few hours honestly.

Hmm....I wish I knew if there was a feature that told you when your last update was. That's the only way I can remember the last time my computer turned itself off against my will.

I don't leave any of it on.

Um..I've left my PC on all night, but that was for a defrag.

PS3 was on for about 10 hrs doing Folding@home once.

my laptop was on for 4 weeks

I left my SNES on overnight once to see if it would help my Sim City population
I've left my 360 on overnight when downloading things or when recovering my gamertag
I've left my PC on for days for many reasons, downloading stuff, Everquest bazaar, just leaving it on...  I've left my new PC on overnight twice already to defrag.  Don't know what the max is, but it's probably not more than a week, if that

i dont have any consoles.

My PS2 for like 7 days, didn't have a memory card so I couldn't save :(

And my Xbox 360 Core was on for  3-4 days.

I don't turn my PC off.  I turn my PS3 off when I'm done using it.  My brother never turns his PS3 off, he does the folding at home thing on it.

I basically leave my laptop on all the time.  I killed my battery doing that though, if I unplug it the batter will die in less than five minutes.  The only reason I've turned off my laptop in the last month was because I went on vacation, but before that It had been on since last February, because that was the last time I was out of town.  It's probably not good for it, but whatever.  I think of it like a refrigerator.

But my consoles are usually always off unless I'm playing a game.  If I play Fallout 3 for 6 hours than my 360 will have been on for 6 hours.

My consoles are only on when I'm playing, but I don't think I have ever turned my PC off, other than for restarts and hardware installs.

I turn my laptop off like once every week or two. The longest i've left a console is with my 360 and that was just overnight when i download things.

left my gamecube on for 24 hours once. it was to unlock a character on super smash bros.

I left my ps2 on for two weeks once because, long story short,  I went on holidays and forgot it was on.

My PC is only almost all the time except for quick reboots.  Recently, I gone from playing P4 for 6-8 hours to watching videos streamed from my computer on my PS3 and that must have been 12 or 13 hours total...and then I fell asleep while it was on so the number was probably closer to 18 hours. 

Even though I love the system and many of the games available for it, if my 360 was running for 18 hours I'm afraid it would melt or explode (maybe both).  Too bad, cause I used to leave my original Xbox on for days at a time with no problem.

The longest one of my PCs has been on is probably about 5 months. As for consoles, I left my N64 on for a week once while I was on vacation (forgot that I had left it on).

I left my NES on for a day.

I only turn off my pc to restart it. I dont understand why people turn off there pc's. They are designed to stay on.

PC has been on for months now, my PS1 was my longest which was on for a week due to the lack of a memory card.

I never leave my PC or my 360 on for longer than 2 days straight. I try to let it rest for at least 8 hours a day while I sleep and just turn it on when I wake up again. It's not that hard and at least it gives me the relief of thinking it'll last longer.

PC is on every 2 weeks. i clean it every month. ps3 is on only when i use it because its 3 times louder than my pc. interestingly, my pc is 5 times bigger than the ps3 and has 3 x 20cm fans and 1 x 80mm fan.

" I only turn off my pc to restart it. I dont understand why people turn off there pc's. They are designed to stay on. "

I have my wii at my dads house, and I didnt notice it was on (and didnt check), long story short, 2 months.

One of my PCs has been on constantly for the last 5.5 years, aside for 2 days of downtime for cleaning dust out/adding new hardware.

I rarely turn my mac off.

I never really have my computer on for more than 2 days, its kinda loud and my case has lots of blue LEDs so it lights up my room at night.

I think my record was 8 months, back when I hosted a dc++ hub.

for all my past consoles probably like 10~12 hours, for my PC about 1 week.

I have never turned me macbook off.  however, they are made like that.

I turn off anything I'm not using usually, if I'm downloading something big though I'll probably leave the console/PC on for a good 8 hours or so before turning it off for an hour and giving it a rest.

Did I mention I make up half of my Dad's electricity bills?

Used to have a laptop that never turned off, just hibernated.

My current PC stays on for weeks at a time, usually only gets turned off so i can give it a quick dusting out. Dosnt even hibernate or go into standby, just stays on forever.

Left my 360 on for atleast 3 days once, didnt realise it was still on.

My PC is rarely, if ever turned off. For my ps2, it was about a week. There was a period of time that I didn't have a memory card for it and played through ratchet and clank 2 by just pausing the game when I wasn't playing. For my 360, it was 2 days to get the Dead rising achievements for surviving 3/5/7 days on infinite mode.

I never turn my PC off, besides restarts. I remember leaving my PS2 on for a few days a long while ago because I did not have a memory card.

What's the longest my PC or console has left me on?

Other than when I had all night video game parties(which are always a blast), I have never had a console on for more than a few hours at a time.  My old PC(which was the better part of a decade old) on the other hand, would be constantly on for months before I would reboot it.  That has changed since I got my new laptop back in last September, though.  I always turn it off when I go to bed.  I have invested $1,700 in this thing and I don't want to mess with it by constantly leaving it on.

Probably only kept my 360 on for about 8 hours before...  I've left my PS2 on for weeks before though.  My PC is almost always on, unless I'm restarting it to install a program or something.